I have searched for heater core leaks, i dont want to remove all dash unit to replace it. Im thinking about to use WYNNS radiator stop leak .

Do you thing it wil work?

Bars products are not awailable in here. My only chance is WYNNS for now.
Thanks.

 

I have never had any luck with long term fixes with Stop Leak. Plus, there is a decent chance it will clog the heater core and a clogged heater core is the main cause of losing heat. I would bypass the heater core (if you can stand not having heat) before I would consider using a Stop Leak.

 

Thanks for the reply.

I had the leak at the beginning of summer, Ihave allready bypassed the heater. I wasnt need heater. But now its getting cold and I need it.

I really wonder what was GM designers / engineers was thinking while desingning such anaccess for a heater core

 

Bite the bullet and have the work done. I have never had any luck with any of the stop leak stuff, regardless of which system it was for.

 

you are right pal, i have tried wynns and powder type but no luck.

By passed for now, going to remove dash I ll also install I pod conenctor to stereo while on it.

 

I have not been into the dash of my 1996 or 2000, but replace the core of an '88 Jimmy. The thought of removing the dash was intimidating but decided to try it anyway.
Piece of cake. 5 large screws and the column dropped down and the passenger side of the dash swung out of the way. No wires or connectors to remove except for the glove box light.
With the newer Blazers, be sure to disable the air bags first.
Give it a shot.

 

96+ years core is real pita to remove

for the airbag,I ll disconnect the battery and run the lightstill any capacitors discharge. Also the fuse will be removed,is there anything necssary to be safe?